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Figures A and B show an AP and lateral radiographs of a 15-year old boy who injured his ankle after skateboarding. What is the mechanism of injury with this type of fracture?
supination - adduction
pronation - abduction
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The fracture shown is a triplane ankle fracture which is an external rotation injury that occurs in patients during early adolescence as described by Spiegel et al in a retrospective review of 237 cases. Kay et al has a nice review of pediatric ankle fractures. CT scans are usually obtained for these fractures and treatment depends on the amount of displacement.
Kay RM, Matthys GA
J Am Acad Orthop Surg. 2001 Jul-Aug;9(4):268-78. PMID: 11476537 (Link to Abstract)
Spiegel PG, Cooperman DR, Laros GS.
J Bone Joint Surg Am. 1978 Dec;60(8):1046-50. PMID: 721852 (Link to Abstract)
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